From: Alan Hourihane <alanh@tungstengraphics.com>
Date: Mon, 13 Oct 2008 11:30:40 +0000 (+0100)
Subject: mesa: when emitting an address load instruction, for
X-Git-Tag: 062012170305~17580^2~496^2~532
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5bc8ebb12be99ac769a0f2ad1f77a16ebb2bf41f;p=profile%2Fivi%2Fmesa.git

mesa: when emitting an address load instruction, for
      indexed elements ensure we write to a single register.
---

diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 9e8daa1..f3c3fa6 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -1579,13 +1579,17 @@ emit_array_element(slang_emit_info *emitInfo, slang_ir_node *n)
    else {
       /* Variable array index */
       struct prog_instruction *inst;
+      slang_ir_storage dstStore = *n->Store;
 
       /* do codegen for array index expression */
       emit(emitInfo, n->Children[1]);
 
       inst = new_instruction(emitInfo, OPCODE_ARL);
 
-      storage_to_dst_reg(&inst->DstReg, n->Store, n->Writemask);
+      if (dstStore.Size > 4)
+         dstStore.Size = 4; /* only emit one instruction */
+
+      storage_to_dst_reg(&inst->DstReg, &dstStore, n->Writemask);
       storage_to_src_reg(&inst->SrcReg[0], n->Children[1]->Store);
 
       inst->DstReg.File = PROGRAM_ADDRESS;